The two most abundant isotopes of boron are 10b and 11b, with 11b being about 4 times more abundant. in the mass spectrum of trimethylborate [(ch3o)3b], a. the peak at m/z 103 has an intensity which is 1/4 the intensity of the peak at m/z 104 b. the peaks at m/z 103 and m/z 104 have equivalent intensities c. the peak at m/z 103 has an intensity which is 4 times that of the m/z 104 peak d. none of the above

Which best describes why nh4+ can form an ionic bond with cl-?

How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles

100 points answer quick the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.